Outside of Kingspeed, maybe the dad from Modern Family and HCP, are there any famous Blazer fans out there? They mentioned one of the Baldwin brothers, and there was that guy from the TV show filmed here, but I don't know if they're fans or fans of convenience.
Allegedly, Elizabeth Banks is a Blazer fan. http://www.cbssports.com/nba/photos/celebrity-fans-of-every-nba-team/28
Elizabeth Banks according to this http://www.si.com/extra-mustard/2014/10/30/ranking-every-nba-team-their-celebrity-fans
Let's not pump up John's big ass head anymore. Outside of Blazer circles, he's not famous. Big fish (and I do mean big), very small pond. Not hating, but come on now.
Those two actors from Grimm go to a lot of games when they are here. Hard to say if they are fans of the Blazers or just starving for entertainment. Timothy Hutton seemed to legitimately be into the games when he did his show here. He won an Oscar, BTW. Used to see Alice Cooper at games from time to time (sans makeup). No idea what he was doing in Portland. I think he's just a sports fan in general. There was a time there when you'd see Blazers jerseys in a lot of music videos and whatnot. We was bad, I guess. By far the most famous Blazers fan is Paul Allen. He's somewhat well known. Yeah, I think we're stuck with Eric. Le Sigh. (J/K Eric. Love ya man.)
Carrie Brownstein (Portlandia) is at several of the games each year; Fred Armisen is with her every so often. Julius mentioned a Baldwin brother, and I believe it's Daniel. I think he lives in Lake Oswego or West Linn. How big of fans are they? Tough to tell.
I sometimes wonder if the TV stars who film in Portland only go to the games to get attention. I once heard that the stars of Grimm ask the Blazers to show them on the jumbo screen and talk about how they're there.
It's Daniel Baldwin and they were living in LO. I remember his wife had a DUI - they were in a big divorce battle a few years ago and the accusations between the two were getting pretty nasty.